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针对投入不同含量的铈镧混合稀土对AZ91D压铸镁合金带来的蠕变性能影响,再经过能谱分析、扫面电镜以及金相显微镜的观察与分析显示,在AZ91D压铸镁合金中加入铈镧后,不仅生成α-Mg,β-Mg17Al12相,还生成了新的稀土化合物Al11RE3(RE=Ce/La),在细化合金显微组织后,提高了合金室温以及高温力学性能。而生成的Al11RE3(RE=Ce/La)能够在高温下使AZ91D+x Ce/La(x=0,0.1,0.5,1.0)合金的抗蠕变能力优于AZ91D镁合金。投入1%含量的Ce/La所形成的合金和AZ91D相比,蠕变能力降低了0.2%,蠕变速率大大减小。本文针对铈镧混合稀土对AZ91D压铸镁合金蠕变性能带来的影响进行实验,分析相关信息。
In view of the influence of mixed cerium-lanthanum mixed rare earths on the creep property of AZ91D die-cast magnesium alloy, the results of energy spectrum analysis, scanning electron microscopy (SEM) and optical microscope observation show that adding cerium and lanthanum , A new rare earth compound Al11RE3 (RE = Ce / La) was also generated not only α-Mg and β-Mg17Al12 phases but also improved the mechanical properties at room temperature and high temperature after the alloy was refined. The resulting Al11RE3 (RE = Ce / La) is superior to AZ91D magnesium alloy in creep resistance of AZ91D + x Ce / La (x = 0,0.1,0.5,1.0) alloys at high temperature. The alloy formed with 1% Ce / La reduced the creep capacity by 0.2% and greatly reduced the creep rate compared to AZ91D. In this paper, the effect of cerium-lanthanum mixed rare earth on the creep property of AZ91D die-cast magnesium alloy was studied and the related information was analyzed.